CLAUDE_CODE_ADOPT_UNDERIVABLE_PARKED_PERMISSION
A Claude Code environment variable, read out of the shipped bundle. It was in the build from v2.1.238 and was gone by v2.1.307.
A resumed headless session could hand you back a permission prompt left unanswered, but three variables must be set.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.238.
In the changelogs
5Releases whose published page names CLAUDE_CODE_ADOPT_UNDERIVABLE_PARKED_PERMISSION.
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v2.1.307
CLAUDE_CODE_ADOPT_UNDERIVABLE_PARKED_PERMISSION no longer has any effect
Claude Code no longer reads CLAUDE_CODE_ADOPT_UNDERIVABLE_PARKED_PERMISSION, and a denied waiting permission request is no longer retired
found in this entry's text
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v2.1.296
CLAUDE_CODE_ADOPT_UNDERIVABLE_PARKED_PERMISSIONis read as an on/off settingCLAUDE_CODE_ADOPT_UNDERIVABLE_PARKED_PERMISSIONis an on/off variable for handling permission requests left waiting in resumed sessionsfound in this entry's text, named in this entry
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v2.1.275
New env var CLAUDE_CODE_PARKED_PERMISSION_WAIT_MS with 2000ms fallback
New CLAUDE_CODE_PARKED_PERMISSION_WAIT_MS env var sets a 2 second default wait for parked permissions
found in this entry's text, named in this entry
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v2.1.273
Interrupted-turn resume and parked-permission-hold behavior moved from env vars to a 'lane' config object
Turn-resume and parked-permission behavior now comes from a 'lane' config object instead of direct env var reads
found in this entry's text
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v2.1.238
Resumed sessions can adopt a permission prompt left waiting
A resumed headless session could hand you back a permission prompt left unanswered, but three variables must be set.
named in this entry, found in this entry's text
First cited
2The earliest release whose published evidence quoted CLAUDE_CODE_ADOPT_UNDERIVABLE_PARKED_PERMISSION was v2.1.238, 20 Aug 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
Presence across releases
2Build by build
60One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the environment variable does. All environment variables.